I thought that the COPO posi unit rear used larger non posi 12 bolt spider gears, special larger tooth side gears, a special machined 30174 case and heat treated 4:10 ring and pinion. Very hard to find especially in good condition.
__________________
70 Camaro LA Z-28 03B Citrus Green LT-1 M-40 3.73's
69 Camaro X-77 Z-28 10C Cortez Silver M-21 3.73's Deluxe Project X - SOLD
69 Camaro X-77 Z-28 01B Garnet Red w/Black top, M-20 3.73 Deluxe Houndstooth
|